### Help get links back from google images ###
RewriteCond %{REQUEST_URI} (.*).(png)$ [NC]
RewriteCond %{HTTP_REFERER} images.google.(.*)$ [NC]
RewriteRule (.*) /picviewer.

php

 ?imgpath=$1 [PT]

<?

php

 
// Put in this array every substring that identifies the URL of an image search:
$hr = array("images.google", "images.search.yahoo.com", "search.live.com/images/");

// Assign the requested URL to $imgpath
$imgpath = '/'.$_GET["imgpath"];

// Loop the array
foreach($hr as $imgreferrer)
{
$found = strpos($_SERVER["HTTP_REFERER"], $imgreferrer); // Check the actual referer against the given ones
if ($found !== false)
{
// if an Image Search URL is detected in the HTTP REFERER value, show landing page:
header("Content-type: text/html");

$linkcode  = '<a href="http://xxx.com" alt="xxx title="xxx">';
$linkcode .= '<img src="http://xxx.com'.$imgpath.'" alt="xxx" title="xxx" />';
$linkcode .= '</a>';
$linkcode = htmlentities($linkcode);
?>

<center>
<h1>Put this image on your site with the following code:</h1>
<? echo $linkcode; ?>
<br /><br />
<img src="<?

php

  echo $imgpath; ?>" alt="" />
</center>

<?

php

 
die(); // Don't go further in the Loop
}
}
//Commented out for now as this file should only be called upon a images.google.* referrer
//header("Content-type: image/png"); // MAKE SURE that the content type matches your image's one here
//echo file_get_contents($imgpath); // MAKE SURE you can open URLs in

PHP

  with file_get_contents()
?>